Anix

From Wotchipedia

Anix
First comic:	Bonus Comic Accidental Merfolk part 2

Anix is a mermaid that encountered Sam during the events of "Accidental Merfolk part 2", which was presented as bonus story available only to paid patrons of Accidental Centaurs.

She is first encountered as Sam is attempting to find help when Alex is stung by a school of jellyfish and is dying from the toxins. She and a group of other merfolk are hiding from a group of creatures known only as "feeders" (so called because they feed on the merfolk). Anix decides to help Sam rescue Alex from the feeders and eventually provides the anitoxin.

The name Anix is not mentioned in the comic, but is taken from Accidental Centaurs creator John Lotshaw's notes.